On Tue, 2009-09-29 at 10:17 +0200, Alexander Graf wrote: > Right now sregs is unused on PPC, so we can use it for initialization > of the CPU. > > KVM on BookE always virtualizes the host CPU. On Book3s we go a step further > and take the PVR from userspace that tells us what kind of CPU we are supposed > to virtualize, because we support Book3s_32 and Book3s_64 guests. > > In order to get that information, we use the sregs ioctl, because we don't > want to reset the guest CPU on every normal register set. > > Signed-off-by: Alexander Graf <ag...@suse.de> > --- > arch/powerpc/include/asm/kvm.h | 2 ++ > 1 files changed, 2 insertions(+), 0 deletions(-) > > diff --git a/arch/powerpc/include/asm/kvm.h b/arch/powerpc/include/asm/kvm.h > index bb2de6a..b82bd68 100644 > --- a/arch/powerpc/include/asm/kvm.h > +++ b/arch/powerpc/include/asm/kvm.h > @@ -46,6 +46,8 @@ struct kvm_regs { > }; > > struct kvm_sregs { > + __u64 pvr; > + char pad[1016]; > }; > > struct kvm_fpu {
Architecturally, PVR is 32 bits, even for PPC64. Is there a reason you want it to be 64 bits here? (I can understand just picking 64 for registers that could be either size, but that's not this case.) -- Hollis Blanchard IBM Linux Technology Center -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html